package com.made2ordersoftware.daycare.control.util;

import java.util.List;
import javax.faces.application.FacesMessage;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.convert.Converter;
import javax.faces.model.SelectItem;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Utility class for all JSF control layer manipulations.
 *
 * @author David
 * @version 1.0.0
 */
public class JsfUtil {

    private static final Logger LOG = LoggerFactory.getLogger(JsfUtil.class);

    /**
     *
     * @param entities
     * @param selectOne
     *
     * @return
     */
    public static SelectItem[] getSelectItems(List<?> entities, boolean selectOne) {
        int size = selectOne ? entities.size() + 1 : entities.size();
        SelectItem[] items = new SelectItem[size];
        int i = 0;
        if (selectOne) {
            items[0] = new SelectItem("", "---");
            i++;
        }
        for (Object x : entities) {
            items[i] = new SelectItem(x, x.toString());
            i++;
        }
        return items;
    }

    /**
     *
     * @param ex
     * @param defaultMsg
     */
    public static void addErrorMessage(Exception ex, String defaultMsg) {
        String msg = ex.getLocalizedMessage();
        if (msg != null && msg.length() > 0) {
            addErrorMessage(msg);
        } else {
            addErrorMessage(defaultMsg);
        }
    }
    
    /**
     *
     * @param msg
     */
    public static void addErrorMessage(String msg) {
        FacesMessage facesMsg = new FacesMessage(FacesMessage.SEVERITY_ERROR, msg, msg);
        FacesContext.getCurrentInstance().addMessage(null, facesMsg);
    }
    
    /**
     *
     * @param messages
     */
    public static void addErrorMessages(List<String> messages) {
        for (String message : messages) {
            addErrorMessage(message);
        }
    }

    /**
     *
     * @param msg
     */
    public static void addSuccessMessage(String msg) {
        FacesMessage facesMsg = new FacesMessage(FacesMessage.SEVERITY_INFO, msg, msg);
        FacesContext.getCurrentInstance().addMessage("successInfo", facesMsg);
    }

    /**
     *
     * @param key
     *
     * @return
     */
    public static String getRequestParameter(String key) {
        return FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap().get(key);
    }

    /**
     *
     * @param requestParameterName
     * @param converter
     * @param component
     *
     * @return
     */
    public static Object getObjectFromRequestParameter(String requestParameterName, Converter converter,
            UIComponent component) {
        String theId = JsfUtil.getRequestParameter(requestParameterName);
        return converter.getAsObject(FacesContext.getCurrentInstance(), component, theId);
    }

}
